21202222121002 has 16 divisors (see below), whose sum is σ = 34306731377352. Its totient is φ = 9769358707200.

The previous prime is 21202222120991. The next prime is 21202222121029. The reversal of 21202222121002 is 20012122220212.

It can be written as a sum of positive squares in 4 ways, for example, as 17846324209081 + 3355897911921 = 4224491^2 + 1831911^2 .

It is a super-3 number, since 3×21202222121002³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678412063 + ... + 678443314.

Almost surely, 2^{21202222121002} is an apocalyptic number.

21202222121002 is a deficient number, since it is larger than the sum of its proper divisors (13104509256350).

21202222121002 is a wasteful number, since it uses less digits than its factorization.

21202222121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356855993.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202222121002 its reverse (20012122220212), we get a palindrome (41214344341214).

The spelling of 21202222121002 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, two".